A multitool or oscillating tool is a power tool that oscillates (rather than rotating or reciprocating), powered by battery or mains. The name "multi-tool" is a reference to the many functions that this tool can perform with the range of attachments available. "Master Tool" is also a trade name used in North America, short for the original tool by Fein called the Multi-Master. Attachments are available for sawing, sanding, rasping, grinding, scraping, cutting, and polishing. History This type of oscillating tool was originally developed by the German manufacturer Fein in 1967 with a design intended to remove plaster casts easily without cutting the patient. This saw was patented as a circular saw with an angular oscillating saw blade. It was used primarily in orthopaedics for cutting plaster casts. The crescent pattern of the oscillating rotation cut through the hard cast without damaging the patient’s skin. The plaster cast saw was equipped with a more powerful gearbox to upgrade it to a chassis saw. The plaster cast saw formed the basis of FEIN's range of sophisticated oscillating power tools. Uses Use of an offset in a fitted blade allows the tool to cut flush with a surface. This is particularly useful when fitting flooring along a skirting board, cutting the skirting to allow the board to slide under for a neat finish. The small form of these tools and the ability to mount the blade or accessory in any orientation allows cutting in areas that are otherwise virtually unreachable. The ability to cut a complex or precise recess without the need to remove the work piece from where is it fixed greatly increases productivity. Small and precise cuts are possible even on end grain. A small sliver can be easily removed from timber cut too long for a perfect fit. The accessory is fitted to the tool by a mechanism which allows that accessory to be rapidly rotated back and forth (oscillated). This creates friction with the sanding attachments, or rapid cutting motions with the saw and grinding attachments. The narrow angle of oscillation allows for precise control over the tool as it does not kick like a rotating or reciprocating tool can. The angle of oscillation creates increasing friction further from the center of the tool as these areas travel a greater distance. The increased friction is particularly apparent with the triangular sanding and grinding attachments which allow the operator